| Message ID | 1428968537-6181-5-git-send-email-nbd@openwrt.org |
|---|---|
| State | Superseded, archived |
| Delegated to: | David Miller |
| Headers | show |
On 14 April 2015 at 01:42, Felix Fietkau <nbd@openwrt.org> wrote: > In very rare cases, the MAC can catch an internal buffer that is bigger > than it's supposed to be. Instead of crashing the kernel, simply pass > the buffer back to the hardware > > Signed-off-by: Felix Fietkau <nbd@openwrt.org> Acked-by: Rafał Miłecki <zajec5@gmail.com> -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/net/ethernet/broadcom/bgmac.c b/drivers/net/ethernet/broadcom/bgmac.c index f897e62..eafdbca 100644 --- a/drivers/net/ethernet/broadcom/bgmac.c +++ b/drivers/net/ethernet/broadcom/bgmac.c @@ -440,6 +440,13 @@ static int bgmac_dma_rx_read(struct bgmac *bgmac, struct bgmac_dma_ring *ring, break; } + if (len > BGMAC_RX_ALLOC_SIZE) { + bgmac_err(bgmac, "Found oversized packet at slot %d, DMA issue!\n", + ring->start); + put_page(virt_to_head_page(buf)); + break; + } + /* Omit CRC. */ len -= ETH_FCS_LEN;
In very rare cases, the MAC can catch an internal buffer that is bigger than it's supposed to be. Instead of crashing the kernel, simply pass the buffer back to the hardware Signed-off-by: Felix Fietkau <nbd@openwrt.org> --- drivers/net/ethernet/broadcom/bgmac.c | 7 +++++++ 1 file changed, 7 insertions(+)